Seismic:Reflection:MCS
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Multi-Channel Seismic Shot Data from the Aleutian Islands Margin, Gulf Of Alaska, acquired during the R/V Marcus G. Langseth expedition MGL1110 (2011)
This data set was acquired with the LDEO Multi-Channel Seismic system during R/V Marcus G. Langseth expedition MGL1110 conducted in 2011 (Chief Scientist: Dr. Donna Shillington). These data files are of SEGD format and include Multi-Channel Reflection Seismic shot data that have not been processed. Data were acquired as part of the projects: Alaska/Aleutian megathrust and Megathrust seismic hazards by reflection mapping, and funding was provided by NSF grant: OCE09-26614.
Shillington, Donna
Investigator
LDEO
Nedimovic, Mladen
Investigator
Dalhousie
Webb, Spahr
Investigator
LDEO
Device Info
Seismic:
LDEO
Platform
Marcus G. Langseth (Array)
LDEO
Awards
Data DOI
Quality
0
Data have not been processed or modified since acquisition (e.g. Realtime navigation or sonar data, raw images etc.).
Data Files
References
Acquisition Information
Documents
Data Citation Information
Related Data Sets
ISO/XML Metadata
References
Shillington et al., 2015 Link between plate fabric, hydration and subduction zone seismicity in Alaska Nat. Geosci. 8. doi: 10.1038/ngeo2586
Li et al., 2015 Downdip variations in seismic reflection character: Implications for fault structure and seismogenic behavior in the Alaska subduction zone JGR Solid Earth . doi: 10.1002/2015JB012338
Abadi et al., 2017 Estimating the location of baleen whale calls using dual streamers to support mitigation procedures in seismic reflection surveys PLoS ONE 12. doi: 10.1371/journal.pone.0171115
Becel et al., 2017 Tsunamigenic structures in a creeping section of the Alaska subduction zone Nat. Geosci. . doi: 10.1038/ngeo2990
Li et al., 2018 Connections between subducted sediment, pore-fluid pressure, and earthquake behavior along the Alaska megathrust Geology 46. doi: 10.1130/G39557.1
Acquisto et al., 2022 Evidence of Strong Upper Oceanic Crustal Hydration Outboard the Alaskan and Sumatran Subduction Zones JGR Solid Earth 127. doi: 10.1029/2022JB024751
Kahrizi et al., 2024 Extensional forearc structures at the transition from Alaska to Aleutian Subduction Zone: slip partitioning, terranes and large earthquakes Comptes Rendus Geoscience 356. doi: 10.5802/crgeos.225
Shillington et al., 2022 Upper Plate Structure and Megathrust Properties in the Shumagin Gap Near the July 2020 M7.8 Simeonof Event Geophysical Research Letters 49. doi: 10.1029/2021GL096974
Grace, 2014 Alaska-Aleutian megathrust: Variation in subducting plate structure and implications for seismicity offshore Alaska Thesis .
von Huene and Miller, 2024 Collision structures of the Prince William terrane and Chugach terrane docking along the Shumagin and Unimak convergent margins, Alaska, USA Geosphere 20. doi: 10.1130/GES02757.1
Acquisto, 2024 Characterizing Incoming Plate Hydration and Overriding Plate Structure at Subduction Zones: Implications for Plate Boundary Slip Behavior Thesis .
Kuehn et al., 2024 Variations in Reflection Signature and Slip Behavior of the Subduction Interface Offshore Alaska Peninsula From 152 to 161 W Geophys. Monogr., AGU . doi: 10.1002/9781394195947.ch15
Download Data Set Metadata Report
XML
MGDS formatted data set xml report containing verbose file and data set level metadata
ISO XML
ISO 19115-compliant xml report containing general data set level metadata
Related Acquisition Information
Seismic Acquisition Parameters
Download as Text: MGL1110
MGL1110_ACQ001 (Lines: Sequence numbers 8-10)
Source Information
AirGun (BOLT:1500LL)
Source Number: 36
Volume (cu in): 6600
Pressure (psi): 2000
Depth (m): 12
Shot Interval (m): 62.5
Distance to Near Channel (m): 325.84
Distance to Antenna (m): 222.7
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 2
Channels Per Cable: 636
Channels Recorded: 1272
Group Spacing (m): 12.5
Cable Spacing (m): 450
Cable Length (m): 7950
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
CNAV 3050 - primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Record Length (sec): 22.528
Details
Near channel numbers were 636 and 1272
Streamer 1 was towed at a depth of 9m, Streamer 2 at 12m
MGL1110_ACQ002 (Lines: Sequence numbers 11-26)
Source Information
AirGun (BOLT:1500LL)
Source Number: 36
Volume (cu in): 6600
Pressure (psi): 2000
Depth (m): 12
Shot Interval (m): 62.5
Distance to Antenna (m): 222.7
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 2
Channels Per Cable: 636
Channels Recorded: 1272
Group Spacing (m): 12.5
Cable Spacing (m): 225
Cable Length (m): 7950
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
CNAV 3050 - primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Details
Streamer 1 was towed at a depth of 9m, Streamer 2 at 12m
Streamer 1 was towed from the stern, distance from center of source to near group was 235.68m
Streamer 2 was towed from the paravane, distance from center of source to near group was 325.84m
Near channel numbers were Streamer 1: 636 and Streamer 2 : 1272
Lines 11-26 were recorded for 22.528s except for part of Line 24 which was recorded only for 18.430s
MGL1110_ACQ003 (Lines: Sequence numbers 27-33)
Source Information
AirGun (BOLT:1500LL)
Source Number: 36
Volume (cu in): 6600
Pressure (psi): 2000
Depth (m): 12
Shot Interval (m): 62.5
Distance to Near Channel (m): 325.84
Distance to Antenna (m): 222.7
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 636
Channels Recorded: 636
Group Spacing (m): 12.5
Cable Length (m): 7950
Cable Depth (m): 12
Near Channel Number: 636
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
CNAV 3050 - primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Details
Data was recorded by a single streamer, Streamer 2, towed from the paravane
Distance from center of source to near group was 325.84m
Lines 27-33 were recorded for 22.528s except for part of Line 29 which was recorded only for 18.430s
org.marine-geo:MGL1110_ACQ001 (Lines: )
Source Information
AirGun
Receiver Information
Hydrophone:Streamer
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
WGS84
Acquisition System
Digital
Name:
Details
Receiver Type: Hydrophone_Streamer
Source Type: SeismicSource_Gun_Air
Acquisition System Name: null
Acquisition System Type: null
Seismic Nav System: null
Survey Datum: WGS84
Source to Near Channel (m): 235.68
Antenna to Source (m): 222.7
Number of Channels Recorded: null
Channel Length (m): null
Cable Receiver Depth (m): null
Source Volume (cubicInches): 6600
Source Pressure (bars): null
Source Number: 10
Source Depth (m): null
Shot Control: null
Shot Interval (s or m): null
Compass Birds: no
Tail Buoy Positioning: no
Recording Delay: no
MGL1110 Documents
Cruise Blog
Go to site
HTML
Daily Field
MGL1110_Daily_Field_Report.pdf (340.0kB)
PDF
MCS Lines
MGL1110_B15_MCS_line_log.pdf (62.0kB)
PDF
MCS Observer Watch
MGL1110_MCS_Observer_Watch.pdf (781.0kB)
PDF
Navigation Watch
MGL1110_Navigation_Watch_Log.pdf (211.0kB)
PDF
Cruise (no appendices)
cruise_report_mgl1110.pdf (57.9MB)
PDF
Cruise (with appendices)
mgl1110.cruiserpt.pdf (205.8MB)
PDF
USGS: Processing Steps and Navigation Notes
Data Collection Summary
MGL1110_DataReport_v1.3.pdf (1.3MB)
PDF
MCS Tow Offset Configuration
MGL1110_Towing_Offsets.pdf (231.0kB)
PDF
How To Cite This Data
Related Data Sets
Sort by:
Seismic:Navigation
Data DOI:
10.1594/IEDA/317817
Seismic Navigation Data (P2 format) from the Aleutian Islands Margin, Gulf Of Alaska, acquired during the R/V Marcus G. Langseth expedition MGL1110 (2011)
Locale
Alaska:Aleutians
FocusSite:GeoPRISMS
File Format
P2
Quality
0
Seismic:Navigation
Data DOI:
10.1594/IEDA/317812
Raw Seismic Navigation Data (P1 format) from the Aleutian Islands Margin, Gulf Of Alaska, acquired during the R/V Marcus G. Langseth expedition MGL1110 (2011)
Locale
Alaska:Aleutians
FocusSite:GeoPRISMS
File Format
P1
Quality
0
Details
These are raw, unprocessed P190 navigation files. Processed P190 navigation files exist (quality=1) and should be used for processing MCS data instead of these files.
Seismic:Navigation
Data DOI:
10.1594/IEDA/317814
Processed Seismic Navigation Data (version 1) from the Aleutian Islands Margin, Gulf Of Alaska, acquired during the R/V Marcus G. Langseth expedition MGL1110 (2011)
Locale
Alaska:Aleutians
FocusSite:GeoPRISMS
File Format
P1
Quality
1
Details
These processed (quality=1) P190 navigation files should be used for processing the MCS data.
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